blocks|key|971963|text|有几种方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|971964|在visual+studio+(和|971965|)中调试C%2B%2B时，你通常可以看到汇编代码。为此，在Visual+Studio中，将断点放在有问题的代码上，当调试器点击断点时，单击并找到"Go+To+Assembly“(或按CTRL%2BALT%2BD+)|ordered-list-item|971966|。第二种方法是在编译时生成程序集清单。为此，请转到项目设置->+C/C%2B%2B+->输出文件->+ASM列表位置并填写文件名。同时选择“汇编输出”到“使用源代码汇编”。|971967|编译程序并使用任何第三方调试器。为此，您可以使用OllyDbg或WinDbg。你也可以使用IDA+(交互式反汇编程序)。但这是最核心的方法。|971968|971969|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|R|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

There are several approaches:

<ol>
<li>You can normally see assembly code while debugging C++ in visual studio (and eclipse too). For this in Visual Studio put a breakpoint on code in question and when debugger hits it rigth click and find "Go To Assembly" ( or press CTRL+ALT+D )</li>
<li>Second approach is to generate assembly listings while compiling. For this go to project settings -> C/C++ -> Output Files -> ASM List Location and fill in file name. Also select "Assembly Output" to "Assembly With Source Code".</li>
<li>Compile the program and use any third-party debugger. You can use OllyDbg or WinDbg for this. Also you can use IDA (interactive disassembler). But this is hardcore way of doing it.</li>
</ol>

blocks|key|972057|text|为cl编译器指定/FA开关。根据开关的值，可以只集成汇编代码，也可以集成高级代码和汇编代码。文件名获取.asm文件扩展名。以下是支持的值：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972058|972059|972060|/FA汇编代码；.asm|unordered-list-item|972061|/FAc机器和汇编代码；.cod|972062|/FAs源代码和汇编代码；.asm|972063|/FAcs机器、源代码和汇编代码；.cod|972064|972065|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|C|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|T|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|U|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|V|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|O|$]]

Specify the /FA switch for the cl compiler. Depending on the value of the switch either only assembly code or high-level code and assembly code is integrated. The filename gets .asm file extension. Here are the supported values:

<hr>

<ul>
<li>/FA Assembly code; .asm</li>
<li>/FAc Machine and assembly code; .cod</li>
<li>/FAs Source and assembly code; .asm</li>
<li>/FAcs Machine, source, and assembly code; .cod</li>
</ul>

blocks|key|972120|text|补充说明:+Debug汇编输出和发布输出有很大的不同。第一个是学习编译器如何从C%2B%2B生成汇编代码的好方法。第二个是很好的学习编译器如何优化各种C%2B%2B结构。在这种情况下，一些C%2B%2B到asm的转换并不明显。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972121|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Additional note: there is big difference between Debug assembler output and Release one. The first one is good to learn how compiler produces assembler code from C++. The second one is good to learn how compiler optimizes various C++ constructs. In this case some C++-to-asm transformations are not obvious.

blocks|key|971935|text|最简单的方法是触发调试器并检查“反汇编”窗口。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|971936|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The easiest way is to fire the debugger and check the disassembly window.

blocks|key|48897|text|由于http://gcc.godbolt.org/提供了适用于ARM、x86和x86-64的Windows+19+RC+(针对调用约定，不同于该站点上的gcc、clang和icc+)，此答案的早期版本(针对rextester.com的“黑客攻击”)大部分是多余的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|48898|Godbolt编译器资源管理器是为很好地格式化编译器asm输出而设计的，去掉了指令的“噪声”，所以我强烈建议使用它来查看asm中的简单函数，这些函数接受args并返回一个值(这样它们就不会被优化掉)。|48899|有一段时间，CL可以在http://gcc.beta.godbolt.org/上使用，但不能在主站点上使用，但现在两者都可以使用。|48900|48901|要从http://rextester.com/l/cpp_online_compiler_visual在线编译器获得MSVC+asm输出:将/FAs添加到命令行选项。让您的程序找到自己的路径，计算出.asm的路径并将其转储。或者在.exe上运行反汇编程序。|CODE|48902|例如http://rextester.com/OKI40941|48903|#include+<string>
#include+<boost/filesystem.hpp>
#include+<Windows.h>

using+namespace+std;

static+string+my_exe(void){
++++char+buf[MAX_PATH];
++++DWORD+tmp+=+GetModuleFileNameA(+NULL,+//+self
++++++++++++++++++++++++++++++++++buf,+MAX_PATH);
++++return+buf;
}

int+main()+{
++++string+dircmd+=+"dir+";
++++boost::filesystem::path+p(+my_exe()+);
++++//boost::filesystem::path+dir+=+p.parent_path();

++++//+transform+c:\foo\bar\1234\a.exe+
++++//+into++++++c:\foo\bar\1234\1234.asm
++++p.remove_filename();
++++system+(+(dircmd+%2B+p.string()).c_str()+);

++++auto+subdir+=+p.end();++++++//+pointing+at+one-past+the+end
++++subdir--;+++++++++++++++++++//+pointing+at+the+last+directory+name
++++p+/=+*subdir;+++++++++++++++//+append+the+last+dir+name+as+a+filename
++++p.replace_extension(".asm");
++++system+(+(string("type+")+%2B+p.string()).c_str()+);
//++++std::cout+<<+"Hello,+world!\n";
}

...+code+of+functions+you+want+to+see+the+asm+for+goes+here+...|code-block|syntax|javascript|48904|type是cat的DOS版本。我不想包含更多的代码，因为这会使查找我想要查看asm的函数变得更加困难。(尽管使用std::string和boost与这些目标背道而驰！一些C风格的字符串操作对GetModuleFileNameA的结果做出了更多关于它正在处理的字符串的假设(并通过使用大缓冲区忽略了最大长度的安全/分配)，那么整个机器代码会少得多。)|48905|不知道为什么，但cout+<<+p.string()+<<+endl只显示基本名称(即文件名，没有目录)，即使打印它的长度显示它不仅仅是裸名称。(Ubuntu15.10上的Chromium48)。在cout中，或者在程序的标准输出和web浏览器之间，可能会有一些反斜杠转义处理。|48906|entityMap|0|LINK|mutability|MUTABLE|url|http://gcc.godbolt.org/|1|http://gcc.beta.godbolt.org/|2|http://rextester.com/l/cpp_online_compiler_visual|3|http://rextester.com/OKI40941|4|http://man7.org/linux/man-pages/man1/cat.1.html^0|1R|1X|2|N|0|0|0|2S|0|0|1T|B|S|1|0|0|0|3K|1Y|4|2R|4|37|4|2|1D|2|0|0|V|2|T|3|0|0|0|4U|0|4|5|3|2N|I|5|3|4|0|0|3V|8|Q|2R|4|0^^$0|@$1|2|3|4|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@$9|1H|A|1I|1|1J]]|E|$]]|$1|F|3|G|5|6|7|1K|8|@$9|1L|A|1M|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1N|8|@$9|1O|A|1P|B|C]]|D|@$9|1Q|A|1R|1|1S]]|E|$]]|$1|J|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|1U|8|@$9|1V|A|1W|B|C]|$9|1X|A|1Y|B|M]|$9|1Z|A|20|B|M]|$9|21|A|22|B|M]]|D|@$9|23|A|24|1|25]]|E|$]]|$1|N|3|O|5|6|7|26|8|@$9|27|A|28|B|C]]|D|@$9|29|A|2A|1|2B]]|E|$]]|$1|P|3|Q|5|R|7|2C|8|@]|D|@]|E|$S|T]]|$1|U|3|V|5|6|7|2D|8|@$9|2E|A|2F|B|C]|$9|2G|A|2H|B|M]|$9|2I|A|2J|B|M]|$9|2K|A|2L|B|M]]|D|@$9|2M|A|2N|1|2O]]|E|$]]|$1|W|3|X|5|6|7|2P|8|@$9|2Q|A|2R|B|C]|$9|2S|A|2T|B|M]|$9|2U|A|2V|B|M]]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|2W|8|@]|D|@]|E|$]]]|Z|$10|$5|11|12|13|E|$14|15]]|16|$5|11|12|13|E|$14|17]]|18|$5|11|12|13|E|$14|19]]|1A|$5|11|12|13|E|$14|1B]]|1C|$5|11|12|13|E|$14|1D]]]]

The earlier version of this answer (a "hack" for rextester.com) is mostly redundant now that <a href="http://gcc.godbolt.org/" rel="nofollow noreferrer">http://gcc.godbolt.org/</a> provides CL 19 RC for ARM, x86, and x86-64 (targeting the Windows calling convention, unlike gcc, clang, and icc on that site).

The Godbolt compiler explorer is designed for nicely formatting compiler asm output, removing the "noise" of directives, so I'd highly recommend using it to look at asm for simple functions that take args and return a value (so they won't be optimized away).

For a while, CL was available on <a href="http://gcc.beta.godbolt.org/" rel="nofollow noreferrer">http://gcc.beta.godbolt.org/</a> but not the main site, but now it's on both.

<hr>

To get MSVC asm output from the <a href="http://rextester.com/l/cpp_online_compiler_visual" rel="nofollow noreferrer">http://rextester.com/l/cpp_online_compiler_visual</a> online compiler: Add <code>/FAs</code> to the command line options. Have your program find its own path and work out the path to the <code>.asm</code> and dump it. Or run a disassembler on the <code>.exe</code>.

e.g. <a href="http://rextester.com/OKI40941" rel="nofollow noreferrer">http://rextester.com/OKI40941</a>

<pre><code>#include &lt;string&gt;
#include &lt;boost/filesystem.hpp&gt;
#include &lt;Windows.h&gt;

using namespace std;

static string my_exe(void){
 char buf[MAX_PATH];
 DWORD tmp = GetModuleFileNameA( NULL, // self
 buf, MAX_PATH);
 return buf;
}

int main() {
 string dircmd = "dir ";
 boost::filesystem::path p( my_exe() );
 //boost::filesystem::path dir = p.parent_path();

 // transform c:\foo\bar\1234\a.exe 
 // into c:\foo\bar\1234\1234.asm
 p.remove_filename();
 system ( (dircmd + p.string()).c_str() );

 auto subdir = p.end(); // pointing at one-past the end
 subdir--; // pointing at the last directory name
 p /= *subdir; // append the last dir name as a filename
 p.replace_extension(".asm");
 system ( (string("type ") + p.string()).c_str() );
// std::cout &lt;&lt; "Hello, world!\n";
}

... code of functions you want to see the asm for goes here ...
</code></pre>

<code>type</code> is the DOS version of <a href="http://man7.org/linux/man-pages/man1/cat.1.html" rel="nofollow noreferrer"><code>cat</code></a>. I didn't want to include more code that would make it harder to find the functions I wanted to see the asm for. (Although using std::string and boost run counter to those goals! Some C-style string manipulation that makes more assumptions about the string it's processing (and ignores max-length safety / allocation by using a big buffer) on the result of <code>GetModuleFileNameA</code> would be much less total machine code.)

IDK why, but <code>cout &lt;&lt; p.string() &lt;&lt; endl</code> only shows the basename (i.e. the filename, without the directories), even though printing its length shows it's not just the bare name. (Chromium48 on Ubuntu 15.10). There's probably some backslash-escape processing at some point in <code>cout</code>, or between the program's stdout and the web browser.

blocks|key|1350368|text|在Visual+C%2B%2B中，输出文件下的项目选项我相信有一个用于输出带有源代码的ASM清单的选项。因此，您将在同一文件中看到C/C%2B%2B源代码和生成的ASM。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1350369|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In Visual C++ the project options under, Output Files I believe has an option for outputing the ASM listing with source code. So you will see the C/C++ source code and the resulting ASM all in the same file.

blocks|key|972156|text|对于MSVC，您可以使用链接器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972157|link.exe+/dump+/linenumbers+/disasm+/out:foo.dis+foo.dll|972158|foo.pdb需要可用才能获取符号|972159|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

For MSVC you can use the linker.

link.exe /dump /linenumbers /disasm /out:foo.dis foo.dll

foo.pdb needs to be available to get symbols

blocks|key|4190258|text|Red+Gate's+.NET+Reflector是一个非常棒的工具，它帮了我很多次。除了可以轻松地显示MSIL之外，这个实用程序的优点是，您可以分析许多第三方DLL，并让Reflector负责将MSIL转换为C#和VB。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4190259|我不能保证代码会像源代码一样清晰，但你应该不会有太多的问题去理解它。|4190260|entityMap|0|LINK|mutability|MUTABLE|url|http://www.red-gate.com/products/reflector/^0|0|P|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

<a href="http://www.red-gate.com/products/reflector/" rel="nofollow noreferrer">Red Gate's .NET Reflector</a> is a pretty awesome tool that has helped me out more than a few times. The plus side of this utility outside of easily showing you MSIL is that you can analyze a lot of third-party DLLs and have the Reflector take care of converting MSIL to C# and VB.

I'm not promising the code will be as clear as source but you shouldn't have much trouble following it.

blocks|key|4190532|text|如果您正在谈论调试以查看汇编代码，最简单的方法是Debug->Windows->反汇编(或Alt-8)。这会让你进入一个被调用的函数，并停留在反汇编阶段。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4190533|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you are talking about debugging to see the assembly code, the easiest way is Debug->Windows->Disassembly (or Alt-8). This will let you step into a called function and stay in Disassembly.

blocks|key|972363|text|使用Visual+Studio+6.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972364|点击菜单项"Project“|972365|点击“设置”|972366|选择页签标题C/C%2B%2B|972367|将“类别”更改为“列出文件”|972368|在"Listing+file+type“下，将组合框从"No+listing”更改为"Assembly+with+machine+code“|972369|程序集源代码文件将作为.cod文件出现在"Release“文件夹中|972370|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|S|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|U|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|V|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|O|$]]

Using Visual Studio 6.0
Click on Menu item &quot;Project&quot;
Click on &quot;Settings&quot;
Select tab header C/C++
Change &quot;Category&quot; to &quot;Listing files&quot;
Under &quot;Listing file type&quot; change the combobox from &quot;No listing&quot; to &quot;Assembly with machine code&quot;
Assembly source code files will appear in &quot;Release&quot; folder as .cod files

I was reading another question pertaining the efficiency of two lines of code, and the OP said that he looked at the assembly behind the code and both lines were identical in assembly. Digression aside, how could I view the assembly code created when a program is compiled.

I'm using Microsoft's Visual C++, but I would also like to know if it's possible to view the assembly behind code written in Visual Basic.

So, how do I view the assembly code behind a program written in higher level languages like C++ and Visual Basic?

How to view the assembly behind the code using Visual C++?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我读到了另一个关于两行代码效率的问题，操作员说他看了代码后面的汇编，两行汇编是一样的。抛开题外话不谈，我如何查看编译程序时创建的汇编代码。我使用的是微软的Visual C++，但我也想知道是否可以查看用Visual Basic编写的代码背后的程序集。那么，如何查看用C++和Visual Basic等高级语言编写的程序背后的汇编代码呢？

问如何使用Visual C++查看代码背后的程序集？
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回答 10

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问如何使用Visual C++查看代码背后的程序集？EN

回答 10

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问如何使用Visual C++查看代码背后的程序集？
EN